Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography Public Deposited

http://ir.library.oregonstate.edu/concern/articles/b8515q38p

This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by the Frontiers Research Foundation. The published article can be found at:  http://www.frontiersin.org/Microbiology.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • To understand mechanisms linking ecosystem processes and microbial diversity in freshwater ecosystems, bacterial productivity and the metacommunity dynamics of species sorting and mass effects were investigated in an 18 ha headwater lake in northern Alaska. On most sampling dates, the phylogenetic composition of bacterial communities in inflowing streams (inlets) was strikingly different than that in the lake and the outflowing stream (outlet) (16S DGGE fingerprinting), demonstrating the shift in composition that occurs as these communities transit the lake. Outlet and downstream communities were also more productive than inlet and upstream communities (¹⁴C-leucine incorporation). Inlet bacteria transplanted to the outlet stream in dialysis bags were equally or less productive than control bacteria, suggesting that the inlet bacteria are capable of growing under lake conditions, but do not remain abundant because of species sorting in the lake. Outlet bacteria (representative of epilimnetic bacteria) transplanted to the inlet stream were less productive than control bacteria, suggesting that lake bacteria are not as well adapted to growing under inlet conditions. Based on water density, inlet stream water and bacteria generally entered the lake at the base of the epilimnion. However, during low to medium flow in the inlet stream the residence time of the epilimnion was too long relative to bacterial doubling times for these allochthonous bacteria to have a mass effect on the composition of outlet bacteria. The highest community similarity between inlet and outlet bacteria was detected after a large rain event in 2003, with over 61% similarity (average non-storm similarities were 39 ± 8%). While mass effects may be important during large storm events, species sorting appears to be the predominant mechanism structuring bacterial communities within the lake, leading to the assembly of a lake community that has lost some ability to function in stream habitats.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Adams HE, Crump BC and Kling GW (2014) Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography. Frontiers in Microbiology, 5:82. doi:10.3389/fmicb.2014.00082
Series
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2014-04-16T17:50:01Z No. of bitstreams: 3 license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5) CrumpByronCEOASMetacommunityDynamicsBacteria.pdf: 1378867 bytes, checksum: 46a38f32ca0c49a3f5de4c0f8d39830f (MD5) CrumpByronCEOASMetacommunityDynamicsBacteria_SupplementaryMaterial.pdf: 353263 bytes, checksum: d08ae7d6f3fce83e843301217fe8f59e (MD5)
  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2014-04-16T17:51:58Z (GMT) No. of bitstreams: 3 license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5) CrumpByronCEOASMetacommunityDynamicsBacteria.pdf: 1378867 bytes, checksum: 46a38f32ca0c49a3f5de4c0f8d39830f (MD5) CrumpByronCEOASMetacommunityDynamicsBacteria_SupplementaryMaterial.pdf: 353263 bytes, checksum: d08ae7d6f3fce83e843301217fe8f59e (MD5)
  • description.provenance : Made available in DSpace on 2014-04-16T17:51:58Z (GMT). No. of bitstreams: 3 license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5) CrumpByronCEOASMetacommunityDynamicsBacteria.pdf: 1378867 bytes, checksum: 46a38f32ca0c49a3f5de4c0f8d39830f (MD5) CrumpByronCEOASMetacommunityDynamicsBacteria_SupplementaryMaterial.pdf: 353263 bytes, checksum: d08ae7d6f3fce83e843301217fe8f59e (MD5) Previous issue date: 2014-03-04

Relationships

Parents:

This work has no parents.

Last modified Default

Items